But it’s starting to get just as dry underground — as Swain knows, since people call his company for help when their well runs dry. Half of New Hampshire is now classified as being in serous drought, with a portion of the Upper Valley in extreme drought. The effect of the dry spell on water supply is mostly seen in shallow, dug wells. “We’re also starting to see problems with shallow drilled wells, less than 200 feet, that were low producers to begin with,” Swain said. “Shallow upper fractured zones are being impacted.”Swain has one piece of advice for people with dry wells who buy water from a tanker: Don’t try to store it in your well.